Rotary brushes



FIG.

FIC3. 3-

INVENTOR. ON YOUNG EDIS United States Patent "ice RUTARY BRUSHES Edison Young, West Springfield, Mass.

Application December 28, 1955, Serial No. 555,991

3 Claims. (Cl. 15-179) This invention is concerned with rotary brushes and particularly those types of rotary brushes used with street cleaners and the like.

Heretofore, when a street cleaner rotary brush, the type that is operated by a motor, wears out, it has been necessary to rebristle the core by rewinding it. This required disassembling the brush assembly and bringing the core into a shop wherein the bristles were replaced by the slow and costly rewinding operation. This is both an expensive and ineflicient procedure.

It is the purpose of the within invention to provide a rotary brush for street cleaners and the like that can be easily bristled.

It is yet another object of the within invention to provide a twisted wire type brush for street cleaners and the like that will both operate efficiently and will be rigid despite the size and weight of the bristles.

It is still another object of the within invention to provide a rotary brush that is simple to attach to the street cleaner.

These and other objects are obtained by mounting the brush into an end plate and providing means in the end plate for being engageable with the street cleaner mechanism. The structure also includes reinforcing rods for maintaining the brush rigid.

Reference is now made to the following detailed description of the drawings, in which Figure 1 is a front elevational view of the brush assembly.

Figure 2 is a View of the end plate assembly taken along line 2-2 of Figure 1.

Figure 3 is a view of the end plate assembly taken along line 33 of Figure 1.

The axle members 1 are of the typical type employed in rotary type street cleaner brushes. They are cylindrical in shape. Each axle 1 terminates in the axle support housing 11 passing through the opening 17, and is permanently secured thereto by being welded, riveted or bolted. The axle support housing 11 is bolted to the end plate 5. The end plate 5 is permanently connected to the axle support housing 11 by bolt-nut assemblies 12 and 13.

In both the end plate 5 and axle support housing 11 are the openings 9, which are lined up with one another to enable the twisted pair of wires 3 to pass therethrough. The twisted wires 3 are threaded at 8 and are secured to to the end plates 5 by the nuts 7.

The bristles 2 are secured to the twisted wires 3 by passing through the opening 14 which are twisted tightly about the bristles 2. This is a conventional procedure for small brushes. The size and number of twists in the wires 3 have been decreased and exaggerated in size in the drawings to teach better the invention. One-half inch wire has been found to be the best for use as the twisted wire 3.

One of the difiiculties encountered in using the twisted Patented Jan. 20, 1959 2 wire method of holding the brush bristles has been the sag resulting from the great weight against the strength of the twisted pair. To use wire of larger size than one half inch tends to be inefficient in maintaining the bristles firmly in the openings 14. Accordingly, some means was required to reinforce the twisted wire 3.

After much experimentation, it was found that at least two reinforcing rods 4, shown in Figure 1, would solve the problem. The rods 4 have threads 15 on each of their ends. The rods 4 pass through the openings 10 in the end plates 5. Nuts 6 are placed upon the threads 15 to permanently secure the rods 4 to the end plate 5. It is within the spirit and scope of this invention to provide more than two reinforcing rods 4.

In Figure 1, the right hand side of the figure, shows the end plate 5, in a quadrant that looks down on the end plate 5 on the left side of the figure. right side shows the ends of the twisted pair of wires 3 in the same plane that is level with the viewer.

The braces 4 are pushed through the bristles 2 and locked into place by the nuts 6. The bristles 2 bind against the braces 2 preventing some of the sag while the rigidity of the end plates 5 caused by the braces 4 prevent the greater amount of the sag.

In operation, the assembly of Figure 1 is placed in the street cleaner in the conventional manner. In order to replace the bristles the twisted pair 3 is taken from the end plates 5 by releasing the nuts 7 and also the nuts 6 which hold the reinforcing braces 4. A new twisted pair 3 with new and increased bristles 2 is then replaced.

In accordance with the foregoing description, an inexpensive and efilcient rotary brush has been provided for street cleaning machines. And in consideration of this disclosure, I claim the following:

1. A rotary brush assembly comprising a pair of end plates, each end plate having, an axle means, a support for said axle means, means for affixing said axle means to said support, and means for securing said support to said end plate, said support and said end plate being circular and said support being smaller than said end plate, bristles, a twisted pair of means for holding said bristles, means for removably fastening said twisted pair to said end plates through openings in said supports.

2. A rotary brush assembly as recited in claim 1 having a plurality of reinforcing rods fastened to said end plates and parallel to said twisted pair, whereby said twisted pair is maintained rigid.

3. A rotary brush assembly comprising a pair of circular end plates, each end plate having a cylindrical axle, a circular plate of smaller diameter than said end plate for supporting said axle, and means for securing said smaller support plate to said end plate, bristles, a twisted pair of wires for holding said bristles, said twisted pair at its ends passing through said circular plates, and said end plates and removably locked thereto, a plurality of rods having each end connected to each end plate and being parallel to the axis of said twisted pair, whereby said twisted pair is maintained rigid and means for disconnecting said rods from said end plates.

References Cited in the file of this patent UNITED STATES PATENTS 422,117 Christoifel Feb. 25, 1890 1,190,798 Quist July 11, 1916 1,967,651 Anderson July 24, 1934 2,682,679 Ballard July 6, 1954 FOREIGN PATENTS 1,061,999 France Dec. 2, 1953 The view on the 

